where, as in the previous sections \({h}=\eta _0{H}\) . As discussed in [1]}, [2]}, [3]}, [4]}, equation (REF ) has a great deal in common with the Dirac equation [5]}, where the operator on the left hand side is analogous to the operator \({\alpha }\cdot \hat{{p}}\) , and the right hand side matrix contains terms analogous to the mass, energy, and an external gauge field.
